when trolling for muskies i use a 3ft long, 7 strand wire leader. one of the reasons for using a 3ft long leader is that when weeds catch on your line and slide down to the bait, they will cut while sliding on the 7 strand. some more reasons are, teeth, gill covers. muskies will roll and the line often times will be wrapped around the fish 3 or 4 times or more. in my opinion when trolling the large baits, a leader does not affect the action of the bait. when casting i use a solid wire leader anywhere from 12in to 18in long. when trolling smaller cranks for walleye i either tie directly to the bait or use a small snap without a swivel. take it for what it’s worth and try it a few different ways and see what works out best for you……….tom f